* The PCI_E4 slot will be unavailable when an M.2 PCIe SSD module has been installed in the M.2_2 slot.
** The PCI_E2/ PCI_E5 slot will be unavailable when an expansion card has been installed in the PCI_E3/ PCI1 slot.

* The PCI_E4 slot will be unavailable when an M.2 PCIe SSD module has been installed in the M.2_2 slot.
** The PCI_E2/ PCI_E5 slot will be unavailable when an expansion card has been installed in the PCI_E3/ PCI1 slot.